Autogenous welding of copper pipe using orbital TIG welding technique for application as high vacuum boundary parts of nuclear fusion devices

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dc.contributor.author Dak, Gaurav
dc.contributor.author Joshi, Jaydeep
dc.contributor.author Yadav, Ashish
dc.contributor.author Chakraborty, Arun
dc.contributor.author Khanna, Navneet
dc.date.accessioned 2020-10-21T05:35:28Z
dc.date.available 2020-10-21T05:35:28Z
dc.date.issued 2020-12
dc.identifier.citation Dak, Gaurav; Joshi, Jaydeep; Yadav, Ashish, Chakraborty, Arun and Khanna, Navneet, "Autogenous welding of copper pipe using orbital TIG welding technique for application as high vacuum boundary parts of nuclear fusion devices", International Journal of Pressure Vessels and Piping, DOI: 10.1016/j.ijpvp.2020.104225, vol. 188, Dec. 2020. en_US
dc.identifier.issn 0308-0161
dc.identifier.uri https://doi.org/10.1016/j.ijpvp.2020.104225
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/5773
dc.description.abstract This research work describes the development of autogenous orbital gas tungsten arc welding for oxygen-free copper pipe. Neutral beam system for fusion devices consists of the different water-cooled component, which is designed and fabricated from pure copper to have the excellent thermal and electrical conductivity from the functionality point of view. Due to their application in a high vacuum along with the nuclear environment, a weld joint of full penetration configuration with a 100% volumetric examination is a mandatory requirement. Welding of pure copper has always been a challenging task because of its high conductivity and reflectivity, even with the use of high energy beam welding techniques (e.g., Electron beam welding and laser beam welding). Further, to compensate the heat dissipation, if the higher arc energy is provided to the base material, it results in the loss of strength, and therefore the selection of welding process and determining the parameters plays a crucial role for pressure withstanding welded connections. Though electron beam welding is a conventionally practiced process for welding of pure copper, the need for massive infrastructure limits its applicability to the large components. The present aim to have an understanding of the applicability of pulsed TIG process, in an autogenous mode for welding of pure copper material is presented. During this research work range of process parameters were used to assess the quality and strength of the joint. The range of process parameters was used to retain the mechanical properties of base material to the extent possible level. While doing, so weldability assessment was made for the shielding gas, welding program (pulse current, background current, and their duty cycles), joint geometry, arc length, and heat inputs. The mechanical and microstructural properties have been evaluated for the range of these parameters. The results have also been compared with the properties achieved by the electron beam welding process to understand what best researchers can achieve with the conventional welding process compared to high energy beam welding.
dc.description.statementofresponsibility by Gaurav Dak, Jaydeep Joshi, Ashish Yadav, Arun Chakraborty and Navneet Khanna
dc.language.iso en_US en_US
dc.publisher Elsevier en_US
dc.subject Oxygen Free Copper en_US
dc.subject Circumferential GTAWNDT Examination en_US
dc.subject Tensile Testing en_US
dc.subject Shielding Gas en_US
dc.subject Microstructure en_US
dc.subject Microhardness en_US
dc.subject SEM Analysis en_US
dc.title Autogenous welding of copper pipe using orbital TIG welding technique for application as high vacuum boundary parts of nuclear fusion devices en_US
dc.type Article en_US
dc.relation.journal International Journal of Pressure Vessels and Piping


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